Force Diagrams | Improve Tuition | Tutors | Tuition | Tutoring | Tutor
Select Page

Force Diagrams

• Force diagrams show which forces are acting on an object in specific directions. You can deduce if the forces are balanced or unbalanced.
• E.g. book on a table

• If the forces are balanced on moving object it carries on moving in the same direction with a steady speed
• E.g. an accelerating car

The orange arrow = driving force of 1500N which makes the car same directionmove forward

The yellow arrow= same directionopposite frictional force of 500N

Unequal sized arrows = unbalanced forces = car accelerates in direction of orange arrow.

• If in a force diagram the forces are acting on the same line (forward and backwards OR up and down), adding and subtracting forces gives you the overall force.
• This helps you to see if an object is: accelerating, decelerating or staying at steady speed.
• Forces acting in opposite directions = subtract
• Forces acting in same direction= add

How long have you…? (present perfect 4) Exercises

Use the information given to create questions beginning with ‘How long…?’

• It is snowing.

• The weather is shining.

• John and Kate are married.

• My brother has gone on holiday.

• My aunty and uncle live in Canada.

• My sister is a teacher.

• I work at the chemist.

• I’ve known Susan since I was a baby.

• Jonathan is learning to speak to Mandarin.

[bg_collapse view=”link” color=”#fafafa” expand_text=”Reveal Answer” collapse_text=”Hide Answer” inline_css=”background: #2ea3f2; padding: 9px; font-size: 14px; font-weight: 600;” ][/bg_collapse]

Fill in the missing gaps in the sentences using the present perfect (=has/have + past participle)

• I have known Kate a long time.

• My brother has been playing the piano he was 11 years old.

• My mum and dad on holiday to America. They

gone since last Sunday.

• I Ben and Emma since primary school.

We to the same primary and secondary school.

• My sister learning to speak French because she
is going to France next month.

[bg_collapse view=”link” color=”#fafafa” expand_text=”Reveal Answer” collapse_text=”Hide Answer” inline_css=”background: #2ea3f2; padding: 9px; font-size: 14px; font-weight: 600;” ][/bg_collapse]

Use the appropriate words in the missing gaps.

have you lived       lives      to

has been       works        have known

I have bought       have worked.

• My sister in Spain. She is studying Spanish

with her friend Rosie. I Rosie since I was 5.

• Spencer like with Jamie. They have worked

together for 2 years.

• How long in Australia?

• a new dress for prom.

• He to Thorpe park.

[bg_collapse view=”link” color=”#fafafa” expand_text=”Reveal Answer” collapse_text=”Hide Answer” inline_css=”background: #2ea3f2; padding: 9px; font-size: 14px; font-weight: 600;” ][/bg_collapse]

Challenge: Create 4 of your own questions beginning with ‘How long……?’

1.

2.

3.

4.

[bg_collapse view=”link” color=”#fafafa” expand_text=”Reveal Answer” collapse_text=”Hide Answer” inline_css=”background: #2ea3f2; padding: 9px; font-size: 14px; font-weight: 600;” ][/bg_collapse]

1 2 3 4 5 6

“Every accomplishment starts
With the decision to try.” Gail Dever

++44 (0)1924 506010